Truck loader



July 14, 1942. l. D. DICKSONY 2,289,437

' TRUCK LOADER Filed Sept. 26, 1941 s Sheets-Sheet 1 INVENTOR frlDDz'ckgon July 14, 1942. I. D-.' DICKSON f ,2 9, 8

TRUCK LOADER Filed Sept. 26, 1941 3 Sheets-Sheet 2 29 INVENTOR ZrZ .D..Diclcson 25 I BY ATTYS Jul 1'4, 1942.

1. D. DICKSON TRUCK 'LOADER Filed Sept. '26, 1941 3 Sheets-Sheet 5INVENTOR Zrl D.Dck.son

ATTYS Patented July 14, 1942 UN IT ED STATES FATE NT OFFICE TRUCK LOADERIrl D. Dickson, Fair Oaks, Calif.

Application. September 26, 194-1, SerialNo. 412,447 (.01.. 212951).

7 Claims.

This invention relates to loading devices for trucks, my principalobject being to provide a loader or hoist for the purpose, adapted to bemounted on the truck, and by means of whichbaled hay, sacked grain, orthe like, can-be quickly lifted from the ground and swung into place onthe truck with little effort.

A further object is to provide a device of this kind arranged as aself-contained unit which may be readily mounted on a standard truck ofthe fiat-bed Or open-body typ Another object is to construct and arrangethe cable-control mechanism of the device so that it may be driven fromthe side power takeoff shaft of the truck, and may be convenientlycontrolled from a point on the ground laterally oifset from the truck.

Another object is to provide a device which is small and compact and yetquite powerful, and which will not take up any load-carrying area on thetruck, and which is not in the way when it is not being used.

A further object of the invention is to provide a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposefor which it is designed.

These objects I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claims.

In the drawings similar characters of reference indicate correspondingparts in the several views:

Figure 1 is a side outline of a conventionaltruck, showing my improvedloader mounted thereon.

Figure 2 is a top plan View of the loader, showing the boom-supportingmast in section.

Figure 3 is a sectional elevation of the loader on the line 33 of Fig.2.

Figure 4 is a sectional elevation of the telescoping mast and boomstructure contracted.

Figure 5 is a fragmentary elevation of the mast structure extended.

Figure 6 is an enlarged fragmentary sectional elevation of the upperswinging unit of the mast taken on the line 6-6 of Fig. 5.

Referring now more particularly to the characters of reference on thedrawings, the loader comprises a rectangular, open horizontal frameadapted to extend under and across the main side frames 2 of a truckjust back of the cab 3. The frame I is rigidly but removably strapped tothe frames 2 by upstanding bolt units 4.

Rigidly secured on and upstanding from the i able in the section 6 isthe central mast section 1', while slidableand turnable in the section 1is the upper mast section 8, from the upper end of which a short boom 9projects horizontally. The mast sections and boom are all tubular sothat the hoist cable [0 may project therethrough from end to end.

Ihe central section 1 is provided adjacent its upper end with a handlell whereby it may be readily pulled up, as well as being prevented fromsliding all the way into the lower section 6. Said section 1 is held upwhen desired by a pin l2 projected through holes l3- in the lowersection 6, said pin being suiiiciently small in diameter so as not tointerfere withthe cable.

The lower end portion of the upper mast section is constructed so thatwhen in operative position the boom will tend to swing of itself througha relatively wide are, from overhanging relation to the ground intooverhanging relation to the truck, or vice versa, as may be desired.This construction is as follows:

A short bottom member 8a of the upper mast section is separate from themain section B, and the lower end of said section 8 is cut on a diagonalas shown at M. The member 8a and the adjacent portion of the section 8are bushed as at l5, and a hollow stem l6 extends through the bushings.The stem is rigidly secured in the bushing of the member ca but isslidable and turnable in the upper bushing, having a head I 1 on itsupper end overlapping said bushing. The stem has a ro11er l'8 securedthereon on one side and riding the inclined track formed by the diagonalout It. It will therefore be seen that when the roller engages the lowpoint of the incline the section 8 will tend to swing around of itselfuntil the roller reaches the high point of the incline, if said rolleris maintained stationary.

When the upper section, which includes the member 8a., is lifted into anoperating position a cross pin I9 is placed through holes 20 in thecentral section I and passes under the member 8a, supporting the same.The entire Weight of the main upper section 8 then of course rests onthe roller l 3. In order to prevent rotation of the member 80., so thatthe roller will be maintained stationary as above stated, said member isprovided with a seat 2| for the pin IS.

The cable IIJ extends from a hook 22 or the like at its outer end abouta pulley 23 at the outer end of the boom, along the boom, about a pulley24 in the junction of the boom and mast section 8, and down through themast sections centrally thereof to a direction changing pulley 25 at thelower end of the mast, below the frame I.

The cable then passes under and about a drum 26. This drum, togetherwith a clutch and brake drum unit 21 of conventional character, isturnable on a shaft 28 extending lengthwise of the truck frames 2 andjournaled in the frame I between the mast and the adjacent frame member2. The shaft 28 is connected by a chain drive 29 or the like withanother shaft 30 parallel to the shaft 28 but journaled in the frame Iadjacent the opposite truck frame member 2. An extension shaft 3!provided with universal joints 32 projects from the forward end of theshaft 30 and is connected to the power take-off shaft 33 of the truck,where it projects from the adjacent side of the transmission housing 34of the truck.

The clutch of the unit 21 is normally disengaged and is engaged whendesired to rotate the drum 26 and wind the cable thereon, by a shiftingunit including a fork 35 journaled in the top and bottom plates 36 ofthe adjacent portion of the frame A substantially horizontal lever 31extends from the pivot of the fork, being connected to a pull rope 38 sothat the clutch may be operated from any desired point on the groundaway from the truck. The brake band 39 of the unit 21' is normally slackand is applied when desired by an actuating lever 40 connected to theband and projecting upwardly through a slot in the upper plate 36, asshown in Fig. 3. This lever 49 also has a pull rope 4| connected theretoso that the brake can be operated from the same point as the clutch.

When the loader is in use the mast sections are extended, and the member8 is set so that the automatic swinging of the boom will be toward oraway from the truck, as loading or unloading conditions may require. Twooperators only are necessaryone on the ground to manipulate the controlsand attach the load to the cable, and the other on the truck to swingthe boom if necessary and detach the load and place it in position onthe truck. When the loader is not in use, the pins l2 and I9 are removedand the mast sections are telescoped into the main section 8, the boombeing then swung to lie transversely of the truck behind the cab.

From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent is:

1. A loading attachment for a truck including a horizontal frame adaptedto extend transversely of a truck below and against the side frame beamsof the truck, means to secure the frame and beams together, a mastsecured on and upstanding from the frame laterally out from one sidebeam, a boom turnably projecting from the upper end of the mast, a hoistcable extending from the outer end of the boom to the lower end of themast and a cable drum mounted on the frame.

2. An attachment as in claim 1, with means to drive the drum including ashaft unit projecting from the frame and adapted for connection with thepower take-off shaft of the truck.

3. In a hoist, a tubular relatively stationary mast section, anothertubular mast section slidable and turnable in the first named section,and movable upward from a telescoped position therein, a boom projectingfrom the upper end of the other section, a detachable element to supportthe other section when raised and means between said element and saidother section to allow of rotation thereof when thus raised andsupported.

4. In a hoist, a tubular relatively stationary mast section, anothertubular mast section slidable and turnable in the first named section.and movable upward from a telescoped position therein, a boom projectingfrom the upper end of the other section, a detachable element to supportthe other section when raised and means between said element and saidother section to allow of rotation thereof when thus raised andsupported and tending to cause said section to rotate of itself in onedirection through a predetermined arc.

5. In a hoist, a tubular relatively stationary mast section, anothertubular mast section slidable and turnable in the first named section,and movable upward from a telescoped position therein, a boom projectingfrom the upper end of the other section, said other section including abottom member and an upper member separate therefrom, a centralconnecting element between the members allowing of limited axialseparation thereof, means to support and hold the lower member againstrotation when the mast section is raised and means between the elementand upper member tending to cause the latter to rotate of itself in onedirection through a predetermined arc.

6. A structure as in claim 5, in which said member supporting meanscomprises a removable cross pin mounted in the first named mast sectionand on which the lower member rests, the bottom of said lower memberhaving a diametral pin engaging seat formed therein.

7. A structure as in claim 5, in which said last named means comprises aroller mounted on a horizontal axis on the element on the outsidethereof; the bottom edge of the upper member resting on the roller andbeing out diagonally relative to the axis of said member.

IRL D. DICKSON.

